Backfire-after turning key off
This could just be a tuning thing.
One thing just in case though, is I noticed one day recently while chasing an erratic idle that wouldn't come down all the way.
(It bugs the crap out of me when things act different every time)
Anyway, I found that the linkage on the passengers side of the carb that blocks the secondaries closed was dragging on the it's corresponding component cause the idle to stop at different places and the only way I could get it to idle down to it's normal idle was to blip the throttle.
Giving just a slight bend to the linkage part solved that and the idle speed is rock solid the same every time now.
This is the the piece I had to bend up a little to get it to idle down reliably.
This could just be a tuning thing.
One thing just in case though, is I noticed one day recently while chasing an erratic idle that wouldn't come down all the way.
(It bugs the crap out of me when things act different every time)
Anyway, I found that the linkage on the passengers side of the carb that blocks the secondaries closed was dragging on the it's corresponding component cause the idle to stop at different places and the only way I could get it to idle down to it's normal idle was to blip the throttle.
Giving just a slight bend to the linkage part solved that and the idle speed is rock solid the same every time now.
This is the the piece I had to bend up a little to get it to idle down reliably.